Anybody got mystery skin from pool party ?!

Base on http://na.leagueoflegends.com/en/page/features/team-up-pool-party

FAQ :

Q: If I have all the champions, do I still get a reward for connecting my account with Facebook? A: Yep! We’ll kick a mystery skin your way instead.

"The only exception is the Mystery Champion, which will roll out by 7/1."

anybody ?